Translator Disclaimer
30 May 2002 Approaching a unified model of pattern detection and brightness perception
Author Affiliations +
Abstract
In order to develop a human vision model to simulate both grating detection and brightness perception, we have chosen four visual functional components. They include a front-end low-pass filter, a cone-type dependent local compressive nonlinearity described by a modified Naka-Rushton equation, a cortical representation of the image in the Fourier domain, and a frequency dependent compressive nonlinearity. The model outputs were fitted to contrast sensitivity functions over 7 mean illuminance levels ranging from 0.0009 to 900 trolands simultaneously with a set of 6 free parameters. The fits account for 97.8% of the total variance in the reported experimental data. Furthermore, the same model was used to simulate contrast and brightness perception. Some visual patterns that can produce simultaneous contrast or crispening effect were used as input images to the model. The outputs are consistent with the perceived brightness, using the same set of parameter values that was used in the above-mentioned fits. The model also simulated the perceived contrast contours on seeing a frequency-modulated grating and the whiteness percepts at different adaptation levels. In conclusion, a model that is based on simple visual properties is promising for deriving a unified model of pattern detection and brightness perception.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jian Yang "Approaching a unified model of pattern detection and brightness perception", Proc. SPIE 4662, Human Vision and Electronic Imaging VII, (30 May 2002); https://doi.org/10.1117/12.469505
PROCEEDINGS
12 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Inverting the perceptual transform
Proceedings of SPIE (April 30 1994)
Contrast gain control for color image quality
Proceedings of SPIE (July 16 1998)
Preference for art: similarity, statistics, and selling price
Proceedings of SPIE (February 17 2010)
Visual aspects of picture storage
Proceedings of SPIE (February 28 1991)

Back to Top